Arock is an unincorporated rural hamlet in Malheur County, Oregon, United States. It is part of the Ontario, OR–ID Micropolitan Statistical Area. There is a post office and K-8 school in Arock, and Jordan Creek flows near Arock and joins the Owyhee River just west of Arock.

History

Arock was supposedly named in 1922 for a rock bearing Native American petroglyphs in the vicinity. Arock post office was established in 1926 and serves ZIP Code 97902. The oldest building in Malheur County, Sheep Ranch Fort, is near Arock. It was added to the National Register of Historic Places in 1974. Arock is one of several places in southeast Oregon that were settled by Basque herders.

Climate

According to the Köppen Climate Classification system, Arock has a semi-arid climate, abbreviated "BSk" on climate maps.

Education

Arock School District No. 81 serves the community. It is a K-8 school and has two teachers, one for elementary and one for junior high school. The school is named W. W. Jones Elementary School.